Dear

In response to your request for verification of employment
for     [name of applicant]    , our records indicate that
(s)he worked for us from     [date]     to     [date]

The position that     [name of applicant]     held with
our firm was     [position]

This is all of the information I am able to provide to you
inasmuch as it is against our company policy to offer
comments in regard to a previous employee's quality of work
during employment with our firm.